DEMAG DC-Com 1, Руководство по эксплуатации

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Tightening torques [Nm] DC 1 / 2 / 5 / 10
Brake 5,5
Electric equipment cover 9,5
Tab. 65
8.5.9 Slipping clutch
8.5.9.1 Checking the slipping clutch
Fig. 65
The slipping clutch provides the function of an emergency limit stop de‐
vice and overload protection for the chain hoist.
The slipping clutch is initially adjusted in the factory. Under normal op‐
erating conditions, the slipping clutch does not need to be re-adjusted.
The slipping clutch must be checked as part of the annual inspection.
The slipping clutch may only be adjusted by authorised specialists. An
increase of the tripping torque which exceeds the factory setting is not
permitted.
Check operation of the slipping clutch as follows:
● The chain collector must be disconnected in order to remove the limit
stop,

"Removing the chain collector box", Page 71. Remove the
limit stop  Fig. 53, Page 81 from the section of chain which is not
under load and fit it above the hook assembly. Run the limit stop
against the guide plate at creep speed. The operating limit switches
– if fitted – must not be actuated while this is being done.
If the slipping clutch is working correctly, the following will be observed:
● the hoist motor fan is still turning while there is no lifting motion;
● The 7-segment display shows the SLIP LIFTING V1 warning,

"Warning messages", Page 98.
When the slipping clutch function has been checked, the limit stop must be fitted again to the section of chain
which is not under load.
8.5.9.2 Adjusting the slipping clutch
Fig. 66
The slipping clutch is adjusted to the load capacity of the chain hoist
during the final inspection in the factory. An increase of the tripping tor‐
que which exceeds the factory setting is not permitted, see also
 "Suspending the chain hoist", Page 40.
For DC-Com chain hoists that have a load capacity ≥ 1000 kg, the set‐
ting meets the requirements of EN 14492 2 for slipping clutches used
as overload protection. Overload protection must be provided for load
capacities ≥ 1000 kg.
If an acceptance check of the hoist or crane installation is carried out, a
load of 110% of the rated load capacity must be lifted (without adjust‐
ment of the slipping clutch) as part of the dynamic overload test. A load
> 160% must not be lifted, (EN 14492-2 "Direct acting rated capacity
limiters").
The slipping clutch is protected against overload by slip monitoring, which means that it does not have to re-ad‐
justed until a general overhaul is carried out. If, owing to the operating conditions or due to malfunctions, the ad‐
justment needs to be checked, a friction force checking device,

part no. 836 708 44, must be used. Inspection
and adjustment may only be carried out by an experienced technician in compliance with the "Friction force
checking device" document  Tab. 3, Page 7.
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